Patents by Inventor Dorothy A. Nappier, legal representative

Dorothy A. Nappier, legal representative has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Countersink drill system
    Patent number: 7614832
    Abstract: A portable, air powered drill has an automated feed system and an adjustable dwell for producing countersunk holes in a workpiece. The feed system uses hydraulic cylinders and pneumatic control logic to control the feed rate, and the dwell time of a countersink drill bit at the end of the drill stroke. A movable mechanical stop permits an operator user to adjust countersink depth. The control logic provides fully automatic feed of the drill bit, and adjustment of the dwell time to consistently produce identical countersunk holes in a variety of workpiece materials.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: November 10, 2009
    Assignee: The Boeing Company
    Inventors: David N. Nappier, Dorothy A. Nappier, legal representative, James L. Morrison, David L. Fritsche